Boiler-flue.



. JACOBS & F. W. SHUPBRT.

BOILER PLUE.

Patented Apr. 14, 1914.

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11. W. JACOBS & P. W. SHUPERT.

BOILER FLUE.

APPLICATION FILED JUNBZQ, 1912.

1,093,429. Patented Apr. 14, 1914.

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APPJIATION FILE) JUNE 29, 1912. 1,093,429. Patented'Apr. 14, 1914.

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`H. W. JACOBS L F. W. SHUPERT.

BOILEPJ FLUE. APPLIUATIQN FILED yJUNE 29, 1912.

Patented A191214, 1914.

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APPLICATION FILED kJUNE 29, 1912. 1,093,429, Patented Apr. 14, 1914.

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BOILEP; FLUB. APP'JIOATION HLED JUNE 29, 1912.

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0 l Regs from the fire-box to the smoke-box end of' for Indiana, respectively, lnew and luseful Improvements in Boilerwill be retarding or slowing boiler lue ofA sheet lventicn also contemplating :STATES PArnur onirica.

Specification of Letters Patent. Application iiledi'une 29, 19127. Serial No. 706,567.

BoILER-FLUE.

Patented Apr. i4, 1914..

To all fwlwm t mafz/ concern that we, HENRY W. JAcoBs and FRANK W. SHUrnnT', citizens ot' the United States, and residents of Topeka, in the county of Shawnee and State of Kansas', and Bristol, county voi" Elkhart, and. State of have'nvented certain Be it known Flues, of which the following is a description, reference being had to theacc'onngianying drawings, which form apart of ;our specification.

Our invention relates' to lues tor boilers of the fire tube or due type. whereby larger passages for the gases of combustion will be provided, so that the gas 'cross-section in the flues is greatly increased 'and thus permit freer passage of the gases through the iues tlirough theiiue atv a very is to provide of means. within the fiues which will result in practically all the heat of the gases being delivered` to the walls of the flue or ilues;`

one function ci' the means being to break up and separate the gases and iiames so as to destroy the insulating Vfilm ordinarily encountered within the fire flues of a boiler, which result from the edge or outer surface of'the gas body becoming cooled down by the walls-of the tubes.; .,.v

Another object of our invention is to provide means whereby the flue or conduct-or the products of cfombustion can be made the employment' and the gases alnot effect a whereby I iue sheets is prevented, and the, whipping Vabout of the fines, inthe Ycase ora locomotive when in operation, is done away with;

and wherein all rolling, expanding, and beading of ,the iiues necessary with the presT ent construction of flue, and which result in cracked and distorted bridges in the flue' sheets, is obviated. In the drawings: Figure lV is a longitudi5 nal sectional view of a locomotive boiler prothe iiue being other portion shown in section. Fig. 2 isa vertical sectional view of Fig. 1, and looking arrows.

vided with our improved fine; a portion of shown in elevation with the taken on the line 2--2 in the direction of the Fig. 3 is a similar view taken on the line 3.-3 of Fig. l 'and looking in the direction of the arrows. Fig. 4 is an enlarged view of our improved boiler iiue showing the same in elevation with portions thereof broken away. Fig. 5 is a partial plan-view and partial sectional plan view of Fig. 4. Fig. 6 is zi partial end elevation and partial sectional view-of theconstruction `shown in Fig. 4C. Fig. 7 is a longitudinal sectional view of a mo boiler, with portions of the fines shown in section.` Fig. 8 is a vertical sectional view taken on the line 8*-8 of Fig. 7, looking in the direction of the arrows. Fig. 9 is a similar view taken on the line 9-9 of Fig. 7 locking in the direction of the arrows. Fig. 10 illustrates a modified form ot' our invention, the boiler flue being shown in longitudinal elevation with portions Vthereot1 broken away. Fig. 1l is a lpartial plan -an'd partial sectional 12 is a partial end and partial sectional end elevation of the construction 'shown in Fig. 10.

In the exemplifications of our invention it is shown in connection with locomotive type of boilers, 'but it will be readily understood that the invention applies to any tire tube 'type of boiler. The invention, however, is

diied form of our invention ap-4 plied toa locomotive plan View of Fig. l0. Fig- :especially adapted to overcome the serious 4 known to the locomotive boiler art, with the boiler shell proper being shown at 15, While 16 represents the throat-sheet of the boilerA Iwhereby the boiler is connected to the rebox, the interiorl whereof is shown at 17 18 represents the fire-box crown-sheet or iire-boX- sections; 19 representing the staysheets or staying members whereby the crown-sheet or fire-box sections'are secured to the wrapper sheet or outside sections 20.

21 represents the lire-box door sheet and 22 represents the back head of the boiler.

23 is the rear or re-box flue sheet of the boiler; while 24 is the front orfboiler flue sheet.

The different parts that have just been referred to,that is the lire-box parts, `the boiler shell and connections are a`lll assembled and secured together in the usual well known manner and form no part of our present invention, so that further detailed description thereof need not be entered into.

While the fire-box shown in the' drawings illustrates what is known as the Jacobs- Shupert type, it is to be understood that our improved boiler liuc can be equally well applied tovor used in connection with any other type or design of fire-box.

The flue shown at 25 in Fig. 1 is formed of flat sheet metal, preferably of a grade of metal commensurate with the service required of a flue, namely material of eiicient heat transmission and endurance, with the sheet of suiicient dimensions toproduce a flue of the desired size. 1n the preferred form of4 our invention, the sheet, before it has been bent into flue form, is provided with a series of symmetrically arranged indentations or impressions as shown at 2 6, in Figs. 1 and 4, whereby the registering teats or studs 26, see Figs. 5 and 6, are produced when the sheet is bent into flue form. These teats or studs 262L are made with a blind punch and cup on a punching machine or hydraulic press. l After the sheet has been provided? with the desired number of impressions, symmetrically arranged, the sheet is thenllbent into the oblong or transversely elongated flue as'clearly shown in Figs. 1, 4,

and 6, with the teats or studs 26a arrangedon the inside of the liue aud'directly opposite each other; the inner edges or poi-n of the coincident or registering studs being in close proximity to each other. .The abutting edges tof' the sheet are.,then welded together, for'minga longitudinal seam either lowenedgeof the ue as inall ,l the top or sure Within the boiler.

.sary welding dicated atf27; the seam being preferablyl welded by the autogenous process,although any 'Well known 'process of welding may be employed which would result in a perfectly itight joint or seam being formed.

The purpose in providing the flues with` the registering studs or teats 26a located within the Hue, that is within the gas space 28 of the flue, is to prevent collapsing of theflues which would be caused by the /pres- As before stated, thev studs on the adjacent faces or side walls .of the Hue are made to register with leach other, or come directly opposite each other, so that when pressure outside of the flue, exerted in the water space 29, is encountered, the registering studs or teats 26a will come together. as. indicated at 30, s'ee F igs. 5 and 6, and thereby form staying means or bracing members for the sides' of the flue and maintain an unrestricted gas (passage within the flues. The flue sheets 23 and 24 are then provided with a'number of slots corresponding with mensions of the flues, as shown at'31 in flue sheet 24, and at 32 in flue sheet 23; the slots in the flue sheets being made sufficiently large to allow'for clearance so that the ends of the f ues may be inserted therein. f The@ ends of the flues are preferably allowed to project throughkthe openings inthe. Hue

i as shown at 33, see Fig, 5, and the edges of the slots in the flue sheet to the outside of the water space are preferably somewhat beveled as indicated at 34, in Fig'. The ends 33 of the flues 25 are then ywelded down to the ue sheets and the neces'- to a thickness equal to that of the liue sheet. It is apparent that the flues will thus be securely fastened to the fluesheets and will be able te withstand the pressure within the boiler as well as .withstand the action ofthe flames and gases. The width of.. the .water spaces 29,seey F'g. 5, is governed by the width of the bridge 35 shown in Fig. 5, and need be no greaterthan that used in the art when round flues dre employed.

In the xernpliication vof our invention as disclosed in Fig. 7, a modified 'method of arranging' the 'iiues is shown; I theqparticular method of arrangement being .more clearly set forth in Fi 9, wherein fiues 25a arev made of small r dimensions transstock added to fill up the bevel .versely than the flues 25,'shown in Figsl,

2, and 3.5 j T U l In the construction shoWn'in-Figs. 7 to 9, the flue sheets 23 and 2 4 are provided w1th several series of slots divided up 'into a few standard sizes, thus necessitating only a few sizes offiues being carried-"1n stock that are vadapted-to the hue space on the flue sheets ofk different .sizedf bollers. therebv obviating c nds wel Fig.. l2.4 The 1,093,429 3 the necessity forv carrying a great many Hues of diHerent widths in stpck to suit the height of Hue space on the Hue sheets of boilers of different sizes. 4 In this arrangement or construction, the Hues are separated vertil cally by the bridges 36, see Figs. 8 and 9,

us providin several series xof Hues arranged in di erent horizontal planes as clearly shown in Figs. 7 to 9. It is apparent that the modication shown in Figs. 7 to 9 may be an advantage over that disclosed in Figs. l to 3, in that repairs may be more easil made, necessitating a smaller sized Hue eing inserted in the event of the replacing of'a damaged Hue, as well as obviating the necessity for carrying a great number of dilferent sized Hues 1n stock. The Hues shown in Figs. 7 to 9 are formed and inserted in the slots of the Hue sheets in the manner reviously described, with their (fed to the Hue sheets so as to form tight joints or connections.

In Figs. 10 to l2 inclusive, we show a modified form of our'invention, wherein the edges of the sheets, from which th Hues are ormed, are bent in that illustrated in Figs. 5" and 6, so that the sheet will form the adjacent side Wall or 'half of two Hues: the sheet being previously indented or impl ssed so as to provide the studs' or teats 26 and the sheet given a return end as indicated at 37,v see Fig. ll. The s eet is 'so bent as to bring the studs or .the outside of the s heet,.

slightly separated. under normal conditions, there may be a slight yielding on the part of the walls ofthe Hue when pressure in the water space is exerted, which will bring the registering studs or tea-ts preflent .collapsing of the Hues or restriction of t e gas passages, which would, of course, interfere with the passage of the gases therethrough.

We have chosen to illustrate the invenit is obvious that 1e inventlon 1s equally as Well adapted for feed Water heater, or boiler wherein hot gases are conducted through tubes orHues adapted to pass through the medium it is intended to eat or convert into a vapor.

By the use of more eliicient b ut as previously stated, t

superheater,

round boiler Hues are ames are iven a greater long the .two Hues and one half of the second sheet constitut- 4 ing a Hue. The adjacent ends of the two sheets or Hue sides are then bent at right angles so as to'bring the ed es tog athr at the point indicated at 38, w ere the edges are welded together, see Fig. 1l, while the longitudinal edges of the adjacent sheeter check, not shown cated in the usual position, the cool Water the bottom of the boiler, passing ack. toward the fire-box, and asA it comes into contact with the hot walls of the Hues, begins to -rise through the long passageways -or spaces between the becoming thoroughly heated.

In `addition'to,the advantages previously hese longitudinal edges may cured together in -any other suitable `Inanner so as to produce a tight joint or con tion.A The Hue area of the Hue sheets 23 and '24 is cut out entirely when this construction is employed, as indicated .at 40 in F- 12', as the return bend and 'bent edsof e respective vsheets or halves of t Hues will constitute the vertically c' posed bridges ntermediate of the Hues and thus form the walls. lof the water space, as shown at 41" ysupper and lower ends of the bent .ledges oit-:the sheets are preferably upset or flared as shown :115,38* see Fig. 312, thus 4vent a whipping about of the Hues while the tlon applied to a locomotive type of boiler, I

are conducive to i al namely while the boiler is not in use, so that but which is lo@ llt respective Hues thereby 1,15 or washing of the is made very much easier, bein0 1n connection with re-v locomotive is rolling or working; a Hue construction --be1ng produced possessing great `ver-tical and transverse strength.

Our improved boiler Hue construction will eliminate a great number of the diHiculties putto severe service or Strains because they are subject to the'l gases of combustion, of

high temperature, on'one side, and the pressure due' to theyconversion of' water into steam, on the other, with the result that .leaky connections soon result, which necessitate new joints being formed by rolling and beading the tubes. With our improved construction, however, the ends of the Hues may 'be vwelded to the Hue sheets and the repeated rolling and beading necessary withv the round boiler Hues is obviated and therefore the greatest -expense in the maintenance of the boiler is eliminated.

.The restricted gas cross-section found in the standard boiler Hues is entirely elimi-l nated by the employment of our invention, and a gas cross-section of increased dimensions is obtained, with the gases passing through the Hues at a very rapid velocity, as the surface friction of the gases will be decreased, and the gas-crosssection will be of such shape that no retarding'or slowing `downeffect in the ytravel of the gases and products of combustion will result as is the casewith the smallround Hues orl tubes at present in use. With -a large boiler Hue,

however, the gases will pass through the Hue 'different studs or teats located within the.

ina body, the center or core of which will'be in la` hotter condition than the edge or out@ side surface thereof, due to the fact'th'at the outer edge or surface of the gas-body is cooledtdownrby contact with the walls of the Hues. The chilling or cooling down of the outer surface of the gas-body in the different Hues tends to have this portion of the gas-body lact as an insulating film whereby the transmissionof heat from the core'or center of the gas-body to the walls ofthe tubes or Hues is prevented In addition to the function of maintaining the walls of the Hues-.in their proper vseparated relation, the

Hues will cause the sheet-like form of Hame and gases to be broken up and thereby destroy the insulating film ordinarily encountered in boiler Hues, with the result that substantially all the heat units of the products of combustion will be transmitted to the walls of the Hue or Hues. f

We have shown and described what we believe to be the best forms` of our invention;

alterations, however, may bemade in cer-l tain details l without 'departing."r from the spirit of our invention; and we dojnot wish to be understood, therefore, as limiting, ourselves to the exact constructions shown and described, but Y What We claim as our invention, and wish to secure by Letters Patent, is

l. A boiler Hue composed vof sheet metal provided with one or more indentationsor impressions, the sheetmetal beingjbent so as to form "substantially Hatparallel Side walls, with -the indentations or impressions arranged in thev Hue interior so as to prevent eollapsing of the Hue sides. I

2. A boiler Hue composed t Hat sheet met-al providedwi'th'a series orindentations or impressions atI prearranged intervals, ythe sheet metal being bent'so as to produce an elongated Hue in cross section with the indentations'or impressions on the portions of the sheet constitutingA the opposite side walls adapted to register with each other.

3. A boiler Hue having substantially parallel side walls arranged to produce an elongated passage lin. cross section', and a series of spaced circular indentations or teats formed on the inner surfaces of the Hue 'side walls,the indentations `or teats ofI the opposite walls being adaptedtoregister with each other. 4 y g f 4. Flues forcb'oilers composed of sheet metal bent ,so as to providey elongatedv pas sages. in' cross section, Vthe abutting edges of theslieets being secured togetherg'withf the end-fof the Hues arrangedtovbe securedto'the Hue sheets of a boiler, the .portions of' the sheets. adapted to `constitute the side wallsof the Hues being arrangedrparallel throughout and provided withoppositely disposed symmetrical indentationsfor teats arranged 4'to register with` each other andl prevent collapsing of the Hues. t 5. BoilerHues side Walls of the beingsecured to the Huesheets of a boiler.

l l formed ofsheet meta-l bent' to provide velongated Hues in cross-section,

the side walls ofthe Hues beingprovided`v with inwardly presented and'op-positelyl disposed indentations jor, impressions" arranged at predetermined intervals .whereby 4collapsing of 'the side walls of the Hues is iis prevented and both vertical and horizontal passages for the gases provided.

6. Boiler Huesl formed ofsheet metal bentv 'so as to provide Hat andfsubstant-iallyparallel side walls, the portions off the sheets adapted to form the side walls ofthe Hues being provided -with inwardly extending A 'tapering lndentations or impressions adapted to prevent collapsingof'the side walls of the lues, with the indentations arranged so as to provide gas passages on all sides thereof.

7. Boiler fines A composed of flat sheet metal provided with symmetrical circular indentations arranged at predetermined intervals, the sheet metal being bent so as 'to present the indentations on the inner surfaces of the flues in an opposing manner and produce vertically and horizontally disposed passages for the gases.

8. Boiler flues formedof sheet metal provided with series of symmetrical, similarly disposed, indentations spaced so as to provide passages on all sides of the indenta- Copies of this patent may be obtained for While the ends of the sheets are bent so as to constitute bridges 6r walls intermediate ot' adjacently placed iues, said ends being adapted to be secured t0 the Hue sheets of a boiler.

HENRY W. JACOBS. Witnesses GEORGE HEIDMAN,

R. E. WIGHTON. FRANK W. SHUPERT.

Witnesses:

G. W. ADAMS, THEODORE ADAMS.

ive cents each, by addressing the-"Commissioner of Patents,` Washington, ID. C. 

